The classical earth pressure theory assumes a semi-infinite soil behind the wall, which is no longer applicable to problem of in case finite soil. A field study was conducted investigate at different excavation depths. cells were used measure change along depth, and measured pressures compared with calculation results for Moreover, influence width-to-depth ratio, cohesion, internal friction ang...

Compared with plain soil, polypropylene (PP) fiber-reinforced soil has markedly improved mechanical properties and can be used in slope protection projects. To investigate the reduction law of antierosion ability parameters PP loess under dry-wet (D-W) cycles freeze-thaw (F-T) cycles, we took from Yan’an, China, mixed them fiber, did shear strength tests, disintegration permeability tests D-W F...

Cohesion is the attraction between adjacent particles within same material, which main inter-controlled factor of fine-grained sediment stability, and thus plays an important role in debris flow hazard early warning. However, there no quantitative model cohesion its factors, including effective internal friction angle, permeability coefficient density. Therefore, establishing a factors consider...

Soil shear strength is an important indicator of soil erosion sensitivity and the tillage performance cultivated layer. Measuring at a field scale difficult, time-consuming, costly. This study proposes new method to predict parameters (cohesion internal friction angle) by combining cone penetration test (CPT) data properties. A portable CPT measuring device with two pressure sensors was designe...

calculation of lateral earth pressure on retaining walls is one of the main issues in geotechnics. the upper and lower bound theorems of plasticity are used to analyze the stability of geotechnical structures include bearing capacity of foundations, lateral earth pressure on retaining walls and factor of safety of slopes. in this paper formulation of finite element limit analysis is introduced ...

A new elasto-plastic constitutive model for jointed rock mass, which can consider the persistence ratio in different visual angle and anisotropic increase of plastic strain, is proposed. The proposed the yield strength criterion, which is anisotropic, is not only related to friction angle and cohesion of jointed rock masses at the visual angle but also related to the intersection angle between ...

Shear strength of aggregates and the bulk soil matrix in two Haploxeroll of central Chile was assessed in order to determine: (1) the effect of previous tillage on shear parameters between aggregates and in the soil matrix and (2) the effects of structure development on differences between dry-wet mechanical parameters. Undisturbed soil cylinders and single aggregates (0-10 cm layer) were colle...

A new approach is proposed to evaluate the non-limit active earth pressure in c–? soil based on horizontal slices method and limit equilibrium method, which takes into account arching effect, displacement, mobilized friction angle, tension cracks, shear stress of layer. The accuracy was demonstrated by comparing experimental results other theoretical methods. comparison showed that appropriate ...